Not sure if you know this or not, but you can ride the original amphibious cars. The ones that Hans Trippel, a German designer, created. The Amphicar Model 770 debuted in 1961. The vehicles were produced in Germany by Quandt Group and available to buy from 1961 to 1968. Production stopped in 1965 with 3,878 produced, of which 3,046 were imported into the U.S.
The only place in the world where you can ride them (unless you own one) is at Disney Springs in Florida: https://britonthemove.com/amphicars/
Also, Mount Dora in Florida has an amphicar festival every year where many owners come and display their cars on the water.
You should check it out if you are into amphibious cars; the history alone is fantastic. Riding one – WOW! Enjoy – Nikki